1 tube) KT77 Gold Lion by M-O Valve Hammersmith, England, like new, top getter like new, faded yellow printing, thin brown base, 1978-1979

81ma

Gm=11,900

Tested on Amplitrex

Vplate=265V

Vscreen=250V

Vgrid=-13.5V

Good Ma range=80-100ma

Good Gm range 11,000-12,000

General Information

The KT77 is designed primarily for use under ultra-linear conditions (43% taps, Class AB1 push-pull)
and this connection is recommended. Similar performance can be obtained in the tetrode connected mode,
but the output impednace (zout) will be higher. Life expectancy=5000 hours when operated at maximum
ratings (32W) or 10,000 hours when operated at (25W)

– Bob Gjika KT77 guitar amp